Question

Suppose that y varies directly with x and y=3 when x=9 what is y when x=18

Answer 1

Given,

The value of y is 3 when the value of x is 9.

x is directly proportional to y.

The value of x is 18.

The value of y is,

`\begin{gathered} (3)/(y)=(9)/(18) \\ 9* y=3*18 \\ y=(54)/(9) \\ y=6 \end{gathered}`

Hence, the value of y is 6.